title: Yields, phenolic profiles and antioxidant activities of Ziziphus jujube Mill. in response to different fertilization treatments.
abstract: Increasing demand for more jujube (Ziziphus jujube Mill.) production requires understanding the specific fertilization needs of jujube trees. This study was conducted to compare fruit yields, phenolic profiles and antioxidant activity of jujube in response to different fertilizers. Application of organic fertilizer appeared to enhance the phenolics and antioxidant activity accumulation of jujubes, compared to conventional fertilized jujubes. Amongst inorganic fertilizers, supplemental potassium as an individual nutrient improved the accumulation of phenolics in jujubes. Our results demonstrate that phenolics levels and antioxidant activity of jujube can be manipulated through fertilizer management and tracked by following proanthocyanidin concentrations. In a practical production context, the combination of organic fertilizers and inorganic fertilizers such as more supplemental individual potassium, and less supplemental individual nitrogen and phosphorus, might be the best management combination for achieving higher phenolic concentration, stronger antioxidant activity and a good harvest.
authors.affiliation: College of Food Science and Engineering, Northwest A & F University, Yangling 712100, Shaanxi, China. wangmin20050606@nwsuaf.edu.cn.
authors.forename: Chun-Sen
authors.initials: CS
authors.lastname: Wu
authors.forename: Qing-Han
authors.initials: QH
authors.lastname: Gao
authors.forename: Roger Keith
authors.initials: RK
authors.lastname: Kjelgren
authors.forename: Xu-Dan
authors.initials: XD
authors.lastname: Guo
authors.forename: Min
authors.initials: M
authors.lastname: Wang
mesh_terms: D001205:Ascorbic Acid / Q000737:chemistry; D052160:Benzothiazoles / Q000737:chemistry; D001713:Biphenyl Compounds / Q000737:chemistry; D005308:Fertilizers; D005419:Flavonoids / Q000737:chemistry / Q000378:metabolism; D016166:Free Radical Scavengers / Q000737:chemistry / Q000378:metabolism*; D005609:Free Radicals / Q000737:chemistry; D005638:Fruit / Q000737:chemistry / Q000378:metabolism*; D010084:Oxidation-Reduction; D010636:Phenols / Q000737:chemistry / Q000378:metabolism*; D010851:Picrates / Q000737:chemistry; D044945:Proanthocyanidins / Q000737:chemistry / Q000378:metabolism; D013451:Sulfonic Acids / Q000737:chemistry; D031957:Ziziphus / Q000737:chemistry / Q000378:metabolism*
chemical_list: D052160:Benzothiazoles; D001713:Biphenyl Compounds; D005308:Fertilizers; D005419:Flavonoids; D016166:Free Radical Scavengers; D005609:Free Radicals; D010636:Phenols; D010851:Picrates; D044945:Proanthocyanidins; D013451:Sulfonic Acids; C013221:proanthocyanidin; C002502:2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid; C004931:1,1-diphenyl-2-picrylhydrazyl; D001205:Ascorbic Acid